نتایج جستجو برای: thermogravimetric analyzer tga

تعداد نتایج: 27263  

2015
Feng-Yuan Huang Xiao-Jie Wu Yan Yu Yan-Hua Lu

In the present paper, a series of totally novel bio-nanocomposite films from cellulose laurate (CL) and starch nanocrystals acetate (SNA) were fabricated, and the properties of nanocomposite films were investigated in detail. SNA was obtained by modifying starch nanocrystals (SNs) produced by sulfuric acid hydrolysis of corn starch with acetic anhydride. The favorable dispersity of SNA in chlor...

Journal: :Journal of nanoscience and nanotechnology 2008
Grace Chigwada Everson Kandare Dongyan Wang Stephen Majoni Darlington Mlambo Charles A Wilkie Jeanne M Hossenlopp

Organically-modified montmorillonite (MMT) clays have been prepared using ammonium salts containing quinoline, pyridine, benzene, and styrenic groups. The nanocomposites were prepared by melt blending and the formation of nanocomposites was characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). Thermal stability and flammability were evaluated by thermogravimetr...

2005
Jelena Macan Ivan Brnardić Sebastijan Orlić Hrvoje Ivanković Marica Ivanković

Degradation kinetics of organic-inorganic hybrid materials based on epoxy resin was investigated by thermogravimetric analysis (TGA). The hybrid materials were prepared from diglycidyl ether of bisphenol A (DGEBA) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) polymerised simultaneously by poly(oxypropylene)diamine (Jeffamine D230). Nanometric level of homogeneity in the hybrids was verified b...

2015
Chia-Hao Wang Maria L. Auad Norma E. Marcovich Steven Nutt

Polyurethane (PU) nanocomposites filled with attapulgite (ATT) nanorods were synthesized and characterized with thermal analysis, dynamic mechanical analysis (DMA), and mechanical testing. The formulations were based on 4,4′-methylene bis(phenyl isocyanate) (MDI), polytetrahydrofuran, 1,4-butanediol, and inorganic ATT premodified with MDI. The original and premodified ATT (ATT–OH and ATT–MDI) n...

2015
Chia-Hao Wang Yeong-Tarng Shieh Gangjian Guo Steven Nutt

The effects of different grafting content of 4,4′-methlenebis(phenyl isocyanate)-modified attapulgite (ATT-MDI) on thermal and mechanical properties of segmented polyurethane (PU) elastomers were investigated. The ATT-MDI nanorods with different grafting content were prepared by treating ATT with heat and acid followed by grafting with MDI molecules. MDI-modified ATT were characterized by trans...

Journal: :Biomacromolecules 2013
Assunta Nuzzo Alessandro Piccolo

The meso-tetra(2,6-dichloro-3-sulfonatophenyl)porphyrinate of manganese(III) chloride [Mn-(TDCPPS)Cl] biomimetic catalyst immobilized on spacer-functionalized kaolinite clay mineral was employed in the oxidative coupling reaction of a dissolved humic acid (HA) suprastructure with either chemical (H2O2) or UV-light oxidation. The changes in molecular size of humic matter subjected to catalyzed o...

2011
Yuan Gao Yitong Zhou Xiaoli Zhang Liping Zhang Ping Qu

A series of materials used for oil absorption based on cellulose fiber grafted with butyl acrylate (BuAc) have been prepared by radical polymerization under ultrasonic waves processing. Effects of ultrasonic dose for the maximum graft yield were considered. The dependency of optimum conditions for oil absorption rate on parameters such as ultrasonic processing time and ultrasonic power were als...

2016
Jingyu Ran Fanxuan Fu Changlei Qin Peng Zhang Lili Yang Wending Wang Lin Yang

Chemical looping gasification (CLG) is a promising method for the utilization of biomass to produce syngas. However, its realization is largely dependent on the use of an oxygen carrier with a high and stable reactivity in cyclic reduction and oxidation. This work focused on the improvement of reactivity and stability of CuO in chemical looping gasification via the addition of MgAl2O4 as an ine...

2009
J. Cheng J. Li J. Y. Zhang

A novel trifunctional epoxy resin 4-(3, 3-dihydro-7-hydroxy-2, 4, 4-trimethyl-2H-1-benzopyran-2-yl)-1, 3-benzenediol glycidyl (shorted as TMBPBTH-EPOXY) was synthesized in our lab to improve thermal performance. Its curing behavior and performance were studied by using 4, 4′-diaminodiphenyl sulfone (DDS) as hardener with the mass ratio of 100:41 of TMBPBTH-EPOXY and DDS. The curing activation e...

2015
Asma Nasrullah Hizbullah Khan Amir Sada Khan Zakaria Man Nawshad Muhammad Muhammad Irfan Khan Naser M. Abd El-Salam

The ash of C. polygonoides (locally called balanza) was collected from Lakki Marwat, Khyber Pakhtunkhwa, Pakistan, and was utilized as biosorbent for methylene blue (MB) removal from aqueous solution. The ash was used as biosorbent without any physical or chemical treatment. The biosorbent was characterized by using various techniques such as Fourier transform infrared spectroscopy (FTIR), ther...

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